Deciphering a Beetle Clock: Individual and Sex-Dependent Variation in Daily Activity Patterns.

Autor:	R R; Institute for Evolution and Biodiversity, University of Münster, Münster, Germany., Prüser T; Institute for Evolution and Biodiversity, University of Münster, Münster, Germany., Schulz NKE; Institute for Evolution and Biodiversity, University of Münster, Münster, Germany., Mayer PMF; Institute for Evolution and Biodiversity, University of Münster, Münster, Germany., Ogueta M; Institute of Neuro- and Behavioural Biology, University of Münster, Münster, Germany., Stanewsky R; Institute of Neuro- and Behavioural Biology, University of Münster, Münster, Germany.; Joint Institute for Individualisation in a Changing Environment, University of Münster and Bielefeld University, Münster and Bielefeld, Germany., Kurtz J; Institute for Evolution and Biodiversity, University of Münster, Münster, Germany.; Joint Institute for Individualisation in a Changing Environment, University of Münster and Bielefeld University, Münster and Bielefeld, Germany.
Jazyk:	angličtina
Zdroj:	Journal of biological rhythms [J Biol Rhythms] 2024 Oct; Vol. 39 (5), pp. 484-501. Date of Electronic Publication: 2024 Jul 31.
DOI:	10.1177/07487304241263619
Abstrakt:	Circadian clocks are inherent to most organisms, including cryptozoic animals that seldom encounter direct light, and regulate their daily activity cycles. A conserved suite of clock genes underpins these rhythms. In this study, we explore the circadian behaviors of the red flour beetle Tribolium castaneum , a significant pest impacting stored grain globally. We report on how daily light and temperature cues synchronize distinct activity patterns in these beetles, characterized by reduced morning activity and increased evening activity, anticipating the respective environmental transitions. Although less robust, rhythmicity in locomotor activity is maintained in constant dark and constant light conditions. Notably, we observed more robust rhythmic behaviors in males than females with individual variation exceeding those previously reported for other insect species. RNA interference targeting the Clock gene weakened locomotor activity rhythms. Our findings demonstrate the existence of a circadian clock and of clock-controlled behaviors in T. castaneum . Furthermore, they highlight substantial individual differences in circadian activity, laying the groundwork for future research on the relevance of individual variation in circadian rhythms in an ecological and evolutionary context. Competing Interests: Conflict of Interest StatementThe authors have no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Databáze:	MEDLINE
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